Researches On The Area Counterreconnaissance Techniques To The Satellite

Reconnaissance by satellites is an important part of the modern military reconnaissance techniques. Reconnaissancing in space with the reconnaissance satellite is the main means in the peacetime. Based on founding a stable orbit prediction system, researching on the techniques for countering the reconnaissance satellite, especially the SAR(Synthetic Aperture Radar) satellite, is of great meaning to the counterreconnaissance of some important areas.In this thesis, researches on the countermeasers to the reconnaissance satellite are carried out under the background of the countermeasures to satellites, the counterreconnaissance and the security evaluation. The following contents are studied in this thesis:1. The SGP4(Simplified General Perturbations Version4)/SDP4(Simplified Deep-space Perturbation Version4) model and the coverage model are simulated with the specific satellite parameters.Adopting the TLE(Two-line mean element) elements of known satellite, the precision of the SGP4/SDP4 model is validated based on MATLAB and STK(Satellite Tool Kit). Setting the sensor of the satellite, the instantaneous area of the coverage and the changing of the area are simulated, the changing curve of the instantaneous area is presented.2. The orbit prediction system is designed and implemented. The"VC+Access+STK"mode is adopted, the VC is taken as the control platform, the Access as the database and the STK as the display platform. Taking the SAR satellite and the optical imaging satellite as an example, the practicality of the system is simulated and validated.3. The jamming techniques to the SAR satellite are studied and the jamming effect of each mode is simulated. The SAR equations under the oppressive jamming is showed and the mathematics model of the modulate means to the oppressive jamming is founded. Simulating the jamming effect of each mode to the SAR. Setting the ground vehicle as a point target and simulating the imaging. Modeling of the active false-target jamming mode is setted up and the jamming effect is simulated.4. The objective evaluating index to the SAR image is analyzed and the rationality of it is validated. The relation and the interaction of the index are studied. The thesis points out that all of the index must be considered in assessing the effect of jamming and can not just using only one index to evaluate the jamming effect.